As typically seen in Smart City, emerging technologies enable
large-scale environment sensing using IoT devices deployed in a wide
area. From the viewpoint of cost and efficiency, infrastructure of the
large-scale environment sensing should be shared by multiple
applications, with dynamically adapting the sensing behavior for
different purposes. To achieve this, the infrastructure must implement
a clever method that can command and control a lot of IoT devices in good
order. To implement such multi-purpose large-scale environment sensing, we
introduce an analogy of military system. Specifically, we propose a
mission-oriented sensing with army hierarchy, where
individual IoT devices and their dynamic purposes are regarded as
soldiers and missions, respectively.